Rather than accept the conventional wisdom that the earth was flat, Christopher Columbus was sent by the king and queen of Spain to see if he could reach India by traveling west.

A. Rather than accept the conventional wisdom that the earth was flat, Christopher Columbus was sent by the king and queen of Spain to see if he could reach India by sailing west.

B. Rather than accepting the conventional wisdom that the earth was flat, Christopher Columbus was sent by the king and queen of Spain to see if he could reach India by sailing west.

C. Instead of accepting the conventional wisdom that the earth was flat, Christopher Columbus sailed west to see whether he could reach India, having been sent by the king and queen of Spain.

D. Rather than accept the conventional wisdom that the earth was flat, Christopher Columbus sailed west to see whether he could reach India, having been sent by the king and queen of Spain.

E. Instead of accepting the conventional wisdom that the earth was flat, Christopher Columbus was sent by the king and queen of Spain to sail west to see if he could reach India.
OA : D
pls shed some light on the having construction of choice D

Actually, I just answered another post on this same topic. Check here: viewtopic.php?f=33&t=1177&p=23882&hilit=columbus#p23882